3 X Trion Air Bear 255649-105 - Pleated Furnace Air Filter 16"x25"x5" MERV 8 MERV 8 filtration Nominal: 16" x 25" x 5" Actual: 15 3/4" x 24 1/4" x 4 7/8" This is not a replacement for a Lennox furnace filter. 3 Pack of Genuine Trion OEM filter